The Effect of Fluid Diversion on the Acid Stimulation of a Perforation

Summary A previously developed model that considers the effect of acidizing on the productivity of a single perforation penetrating a sandstone reservoir was extended to account for the effect of particulate diverting agents on acid distribution inside the perforation. Cases were run that simulate various types of formation damage, including damage from drilling-mud infiltration and damage caused by perforating itself. The model predicts the evolution of the perforation skin factor as acid dissolves formation minerals in the surrounding region. The primary result of this work is that, for the types of damage simulated, fluid diversion within a perforation has little effect on stimulation performance. Although the diverting agent significantly changes the acid distribution at the perforation surface, the acid tends to migrate rapidly to undamaged regions in the formation. This paper presents results from a series of case studies that emphasized the effect of fluid diversion inside a perforation.

The Effect of Fluid Diversion on the Acid Stimulation of a Perforation Academic Article